Am Mittwoch, 18. Oktober 2023, 08:17:04 CEST schrieb Sascha Hauer: > The DFI is a unit which is suitable for measuring DDR utilization, but > so far it could only be used as an event driver for the DDR frequency > scaling driver. This adds perf support to the DFI driver. > > Usage with the 'perf' tool can look like: > > perf stat -a -e rockchip_ddr/cycles/,\ > rockchip_ddr/read-bytes/,\ > rockchip_ddr/write-bytes/,\ > rockchip_ddr/bytes/ sleep 1 > > Performance counter stats for 'system wide': > > 1582524826 rockchip_ddr/cycles/ > 1802.25 MB rockchip_ddr/read-bytes/ > 1793.72 MB rockchip_ddr/write-bytes/ > 3595.90 MB rockchip_ddr/bytes/ > > 1.014369709 seconds time elapsed > > perf support has been tested on a RK3568 and a RK3399, the latter with > dual channel DDR. > > Reviewed-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx> > Acked-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx> > Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> Acked-by: Heiko Stuebner <heiko@xxxxxxxxx>
